/**
 * Copyright (c) 2006-2015, JGraph Ltd
 * Copyright (c) 2006-2015, Gaudenz Alder
 */
/**
 * Class: mxRectangleShape
 *
 * Extends <mxShape> to implement a rectangle shape.
 * This shape is registered under <mxConstants.SHAPE_RECTANGLE>
 * in <mxCellRenderer>.
 *
 * Constructor: mxRectangleShape
 *
 * Constructs a new rectangle shape.
 *
 * Parameters:
 *
 * bounds - <mxRectangle> that defines the bounds. This is stored in
 * <mxShape.bounds>.
 * fill - String that defines the fill color. This is stored in <fill>.
 * stroke - String that defines the stroke color. This is stored in <stroke>.
 * strokewidth - Optional integer that defines the stroke width. Default is
 * 1. This is stored in <strokewidth>.
 */
function mxRectangleShape(bounds, fill, stroke, strokewidth) {
    mxShape.call(this);
    this.bounds = bounds;
    this.fill = fill;
    this.stroke = stroke;
    this.strokewidth = (strokewidth != null) ? strokewidth : 1;
};

/**
 * Extends mxShape.
 */
mxUtils.extend(mxRectangleShape, mxShape);

/**
 * Function: isHtmlAllowed
 *
 * Returns true for non-rounded, non-rotated shapes with no glass gradient.
 */
mxRectangleShape.prototype.isHtmlAllowed = function () {
    var events = true;

    if (this.style != null) {
        events = mxUtils.getValue(this.style, mxConstants.STYLE_POINTER_EVENTS, '1') == '1';
    }

    return !this.isRounded && !this.glass && this.rotation == 0 && (events ||
        (this.fill != null && this.fill != mxConstants.NONE));
};

/**
 * Function: paintBackground
 *
 * Generic background painting implementation.
 */
mxRectangleShape.prototype.paintBackground = function (c, x, y, w, h) {
    var events = true;

    if (this.style != null) {
        events = mxUtils.getValue(this.style, mxConstants.STYLE_POINTER_EVENTS, '1') == '1';
    }

    if (events || (this.fill != null && this.fill != mxConstants.NONE) ||
        (this.stroke != null && this.stroke != mxConstants.NONE)) {
        if (!events && (this.fill == null || this.fill == mxConstants.NONE)) {
            c.pointerEvents = false;
        }

        if (this.isRounded) {
            var r = 0;

            if (mxUtils.getValue(this.style, mxConstants.STYLE_ABSOLUTE_ARCSIZE, 0) == '1') {
                r = Math.min(w / 2, Math.min(h / 2, mxUtils.getValue(this.style,
                    mxConstants.STYLE_ARCSIZE, mxConstants.LINE_ARCSIZE) / 2));
            }
            else {
                var f = mxUtils.getValue(this.style, mxConstants.STYLE_ARCSIZE,
                    mxConstants.RECTANGLE_ROUNDING_FACTOR * 100) / 100;
                r = Math.min(w * f, h * f);
            }

            c.roundrect(x, y, w, h, r, r);
        }
        else {
            c.rect(x, y, w, h);
        }

        c.fillAndStroke();
    }
};

/**
 * Function: isRoundable
 *
 * Adds roundable support.
 */
mxRectangleShape.prototype.isRoundable = function (c, x, y, w, h) {
    return true;
};

/**
 * Function: paintForeground
 *
 * Generic background painting implementation.
 */
mxRectangleShape.prototype.paintForeground = function (c, x, y, w, h) {
    if (this.glass && !this.outline && this.fill != null && this.fill != mxConstants.NONE) {
        this.paintGlassEffect(c, x, y, w, h, this.getArcSize(w + this.strokewidth, h + this.strokewidth));
    }
};